已知可导函数f(x)(x∈R)的导函数f′(x)满足f′(x)>f(x),则当a≥0时,f(a)和eaf(0)(e是自然对数的底数)大小关系为()
A.f(a)≥eaf(0)
B.f(a)>eaf(0)
C.f(a)≤eaf(0)
D.f(a)<eaf(0)